KR100438055B1 - Telephone adapt for Privacy - Google Patents

Abstract

The present invention relates to an adapter having a simultaneous call prevention function used in a general telephone using two or more connected to one line, the circuit used in the adapter is a second telephone, if the line (L1) is in use first, Do not use fax or modem. When a ring signal rings at the same time on the phone A 200 and the phone B 300 connected to one line, the first side is connected, and the other phone is not connected.

When the circuit is connected between the telephone station switch 100 and the telephone A 200 and the voltage drops, the voltage does not pass to the circuit because of the zener diode 22 of the adapter 20. Therefore, since the SCR 23 is not triggered, the phone B 300 is not connected to the line.

Since the voltage from L1 is +/- polar, the user has configured the same circuit (11, 12, 13) (14, 15, 16) to connect the adapter 10 to L1 regardless of polarity.

Description

Simultaneous call prevention adapter {Telephone adapt for Privacy}

The prior art implements a method of operating a switch in a microcomputer by measuring a voltage by making a switch in front of a hook switch in a telephone. There was no way to implement simultaneous call prevention as an adapter.

Existing users who use a telephone without a simultaneous call function must purchase a new telephone with a simultaneous call protection function in order to obtain the simultaneous call function.However, the designed technology allows a user to attach the simultaneous call prevention function by attaching a simple adapter without purchasing a new telephone. Can have

Figure 1: Overall Circuit Diagram

Figure 2: Adapter Model

The circuit used in this adapter first disables the use of a second telephone, fax or modem if line L1 is in use. This means that when the telephone is in the "on hook" state, a voltage of 50V to 30V is applied across the input terminal of the line L1, at which time the current hardly flows. When the phone is in the " off hook " state to use the telephone, a circuit is connected between the telephone office switchboard 100 and the telephone A 200, and a current flows.

When the telephone station exchange 100 sends a ring signal, the telephone signal is sent to the telephone A 200 and the telephone B 300 connected to L1, and the ring signal passes through the AC 90 to AC 120 zener diodes 12 and 22, and the telephone A 200 is transmitted. And ring the phone B (300).

When a ring signal rings at the same time on the phone A 200 and the phone B 300 connected to one line, the first side is connected, and the other phone is not connected.

When the circuit is connected between the telephone station switch 100 and the telephone A 200 and the voltage drops to 10V, the voltage does not pass to the circuit because of the 15V zener diode 22 of the adapter 20. Therefore, since the SCR 23 is not triggered, the phone B 300 is not connected to the line.

Since the voltage from L1 is +/- polar, the user has configured the same circuit (11, 12, 13) (14, 15, 16) to connect the adapter 10 to L1 regardless of polarity.

1) When the phone A 200 is in use, the phone B 300 is unavailable.

Phone A (200) Sound Does Not Hear on Phone B (300)

2) It is possible to exchange from telephone A (200) to telephone B (300).

* When a call comes from a wireless phone: When the phone A 200 passes the phone from the phone B 300 to the phone B (300) to lift the phone A (200) to be exchanged to the phone B (300).

* When a call comes from a landline: When handing over the telephone from the telephone A 200 to the telephone B 300, the telephone A 200 is disconnected and the telephone B 300 is exchanged.

This ensures additional privacy while retaining the functionality of traditional telephones.

To keep a person's privacy, a user with multiple phones on a line had to either buy a new phone with simultaneous call protection or a new phone line. However, from now on, only a simple adapter is installed, and it is a function necessary for the modern society where personal privacy is important by having a call prevention function even with an existing phone.

Claims (1)

1. As a circuit for implementing the simultaneous call prevention function, using the voltage difference between the on hook and off hook of the telephone connected to the line L1, the receiver of the telephone A 200 connected to the adapter 10 Once triggered in a manner that triggers the SCR (11) connected to the + side, because the zener diode 12 of the specific voltage does not flow current to the zener diode 12, only current flows to the SCR (11), so the call is made. When the line L2 is in use, even when the telephone B 300 connected to the adapter 20 is used, the current does not flow due to the zener diode 22 of the adapter 20 connected to the line L1 + side, and the telephone B ( In 300), a circuit constructed in such a way that no sound is heard and the phone B 300 cannot be used as a built-in, adapter, or external device is implemented.